John Medlar, the 23-year-old spokesman, said he and other young men began communicating on the Internet to express alarm over what they viewed as support for protesters who set fires, damaged property, and started fights following the University of California Berkeley’s decision to invite controversial conservative figures to speak. “We were alarmed that people were OK with fringe anarchists burning down a campus and driving [out] speakers,’’ Medlar said. ... “We denounce the politics of supremacy and violence. We denounce the actions, activities, and tactics of the so-called Antifa (militant leftists) movement. We denounce the normalization of political violence,’’ the...